Question: Which Class IIIA combustible liquid has the highest IDLH?
Paraphrase: State the Class IIIA combustible liquid with highest IDLH.
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q21009058 . ?ent wdt:P2129 ?obj } ORDER BY DESC(?obj)LIMIT 5 
Answer: Pyrethrum, Dipropylene glycol methyl ether, 2-butoxyethanol, Methylcyclohexanol, cyclohexanol